Host range susceptibility of Enterococcus sp. strains isolated from diseased turbot: possible routes of infection.

Applied and Environmental Microbiology
J L RomaldeA E Toranzo

Abstract

Experiments were conducted to assess the pathogenicity of Enterococcus sp. strains isolated from diseased turbot for several fish species (turbot, salmon, trout, and seabream), as well as for mice. The intraperitoneal injection assays indicated that the tested strains showed host specificity for turbot, with a high degree of virulence (50% lethal dose of 10(4) cells per g of fish). The Spanish Enterococcus sp. isolates were nonpathogenic for the other fish species studied and for mice. The possible routes of infection were determined by bath exposure (with and without prior abrasion of the skin) and by intragastric inoculations with food and feces contaminated with the pathogen. The bath challenges indicated that the Enterococcus isolates were able to overcome the defense mechanisms present on the surface of the turbot only if the skin was abraded prior to the exposure. The antibacterial activities of components of a glycoprotein nature present in the turbot skin mucus are probably responsible in part for the resistance in noninjured fish to infection. On the other hand, we demonstrated the capacity of this pathogen to overcome adverse conditions in the stomachs of fish when associated with food or fecal material, since it is a...Continue Reading

References

Jul 1, 1991·International Journal of Systematic Bacteriology·R KusudaJ L Fryer
Aug 1, 1966·Journal of Bacteriology·J A Robinson, F P Meyer

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Citations

Jul 7, 2009·The Journal of Veterinary Medical Science·Alper CiftciSibel Güngördü
Oct 24, 2009·Journal of Applied Microbiology·M Y JungW Kim
Oct 6, 1998·Applied and Environmental Microbiology·A ZlotkinA Eldar
Mar 2, 1999·Applied and Environmental Microbiology·A EldarH Bercovier

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